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/*******************************************************************************
* Copyright (c) 2013 protos software gmbh (http://www.protos.de).
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* CONTRIBUTORS:
* Henrik Rentz-Reichert (initial contribution)
*
*******************************************************************************/
package org.eclipse.etrice.ui.common.quickfix;
import java.lang.reflect.Method;
import java.util.List;
import org.eclipse.xtext.ui.editor.quickfix.Fix;
import org.eclipse.xtext.validation.Issue;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
/**
* This class is intended to be sub-classed and the derived class should define
* methods that match the signature assumed by {@link #getFixMethodPredicate(String)} and that
* are annotated with {@link Fix}.
*
* @author Henrik Rentz-Reichert
*
* (copied from Xtext and modified for our purposes)
*
*/
public abstract class AbstractQuickfixProvider {
protected Predicate<Method> getFixMethodPredicate(final String issueCode) {
return new Predicate<Method>() {
public boolean apply(Method input) {
Fix annotation = input.getAnnotation(Fix.class);
boolean result = annotation != null && issueCode.equals(annotation.value())
&& input.getParameterTypes().length == 2 && Void.TYPE == input.getReturnType()
&& input.getParameterTypes()[0].isAssignableFrom(Issue.class)
&& input.getParameterTypes()[1].isAssignableFrom(IssueResolutionAcceptor.class);
return result;
}
};
}
protected List<IssueResolution> getResolutions(Issue issue, List<Method> fixMethods) {
IssueResolutionAcceptor issueResolutionAcceptor = new IssueResolutionAcceptor();
for (Method fixMethod : fixMethods) {
try {
fixMethod.setAccessible(true);
fixMethod.invoke(this, issue, issueResolutionAcceptor);
} catch (Exception e) {
}
}
return issueResolutionAcceptor.getIssueResolutions();
}
protected Iterable<Method> collectMethods(Class<? extends AbstractQuickfixProvider> clazz, String issueCode) {
List<Method> methods = Lists.newArrayList(clazz.getMethods());
return Iterables.filter(methods, getFixMethodPredicate(issueCode));
}
protected List<Method> getFixMethods(final Issue issue) {
return Lists.newArrayList(collectMethods(getClass(), issue.getCode()));
}
public boolean hasResolutionFor(final String issueCode) {
if (issueCode == null)
return false;
Iterable<Method> methods = collectMethods(getClass(), issueCode);
return methods.iterator().hasNext();
}
public List<IssueResolution> getResolutions(final Issue issue) {
List<Method> fixMethods = getFixMethods(issue);
return getResolutions(issue, fixMethods);
}
}
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